export default{
	namespaced:true,
	
	state:()=>({
		//购物车信息
		cart:JSON.parse(uni.getStorageSync('cart') ||'[]')
	}),
	mutations:{
		addToCart(state,goods){
			const findResult=state.cart.find(x=>x.goods_id===goods.goods_id)
			
			if(!findResult){
				state.cart.push(goods)
			}else{
				findResult.goods_count++
			}
			
			this.commit('m_cart/saveToStorage')
		},
		saveToStorage(state){
			uni.setStorageSync('cart',JSON.stringify(state.cart))
		},
		updateGoodsState(state,goods){
			const findResult=state.cart.find(x=> x.goods_id===goods.goods_id)
			if(findResult){
				findResult.goods_state=goods.goods_state
				this.commit('m_cart/saveToStorage')
			}
		},
		updateGoodsCount(state,goods){
			const findResult=state.cart.find(x=> x.goods_id===goods.goods_id)
			if(findResult){
				findResult.goods_count=goods.goods_count
				this.commit('m_cart/saveToStorage')
			}
		},
		removeGoodsById(state,goods_id){
			state.cart=state.cart.filter(x=>x.goods_id!==goods_id)
				this.commit('m_cart/saveToStorage')
			
		},
		//
		updateAllGoodsState(state,newState){
			state.cart.forEach(x=>x.goods_state=newState)
			this.commit('m_cart/saveToStorage')
			
		}
	},
	getters:{
		//购物车所有商品的数量
		total(state){
			// let c=0
			// state.cart.forEach(x=>c+=x.goods_count)
			// return c
			 return state.cart.reduce((total,item)=>total+=item.goods_count,0)
		},
		//已勾选的数量
		checkedCount(state){
			return state.cart.filter(x=>x.goods_state).reduce((total,item)=> total+=item.goods_count,0)
		},
		//已勾选商品的总价
		checkedGoodsAmount(state){
			return state.cart.filter(x=>x.goods_state).reduce((total,item)=>total+=item.goods_count*item.goods_price,0).toFixed(2)
		}
		
	}
}